Allucard

A wolf who grew up in a forest full of evil forces, he developed demon powers as a pup. Technically not a hellhound, but he has the abilities of one. He's part of the pack that lives near Moontown, and friends with Ichigo - he can't shapeshift, but he can talk, so they've successfully snuck him into the mall to buy stuff at hot topic.

He's afraid of cartoon vampires, so he wears a collar with a cross on it, and doesn't go out on nights with a narrow or new moon unless he has a lantern with him. He gardens for the pack, and grows a lot of garlic.